The altcoin market experienced a sharp downturn starting October 7, 2025, losing $384 billion in market capitalization by November 21. This plunge, excluding stablecoins, Bitcoin, and Ethereum, mirrors past four-month declines of 53%, but recovery depends on capital rotation, on-chain activity, and Bitcoin-altcoin de-correlation. Altcoin Seasonal Index signals dominance of Bitcoin, with capital concentration keeping [...]